* {
    padding: 0;
    margin: 0;
}

body {
    background-image: url(../格式化文本/img/beijing.jpg);
    background-size: cover;
    background-repeat: no-repeat;
}

.header {
    display: flex;
    width: 100%;
    height: 50px;
    background-color: rgb(148, 148, 228);
}

.header a {
    padding-left: 450px;
    line-height: 50px;
    text-decoration: none;
    font-size: 18px;
    letter-spacing: 2px;
    word-spacing: 5px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    line-height: 30px;
}

.btn {
    display: flex;
    padding: 5px 15px;
    background-color: #6a43c3;
    color: rgb(254, 253, 253);
    text-decoration: none;
    border-radius: 5px;
    width: 40px;
    height: 30px;
}

#unique-element {
    color: rgb(232, 50, 50);
}

input[type="text"] {
    width: 30%;
    padding: 5px;
    border-radius: 5px;
}

input[type="checkbox"] {
    width: 30px;
    height: 30px;
    background-color: cornflowerblue;
}


a:hover {
    color: rgb(205, 177, 62);
}

button:active {
    background-color: #0056b3;
}